Question

usando a propriedade fundamental calcule x na seguinte proporção 7   =   5

                                                                                                          2x-1     2x+1

Answer 1

7(2x + 1) = 5(2x - 1)
14x + 7 = 10x - 5
14x - 10x = -5 - 7
-4x = -12 (-1)
4x = 12
x = 12/4
x = 3